PSYB51H3 Study Guide - Georges Braque

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21 May 2014
Perception Lec 4 Perceiving and recognizing objects
Short answer question:
- know what action potential is, not tested for it but you need it for other things
- you need to apply concepts to numbers, but no calculations
- Fourier transform, not covered in lec 1 but covered in lec 3
- When mc and SA ques always from slides!
Lecture notes
-mapping these areas
-bottom-up processing- how the brain pieces tings together to get objects
-top down processes
- Identifying where is happening what
- Some ventral stream areas: Lateral occipital complex, Parahippocampal place
area: scenery locations, fusiform face area: faces, Extrastriate body area: bodies,
lighting up to the side of bodies without the head
- Dorsal steam in terms of motion perception
- Object perception, recognition, identification, and object naming
Mechanisms of middle vision
Limits of Edge in vision
- What v1 sees, challenges: curved lines, gaps and overlap
- Gestalt, German word for “whole
- Gestalt laws (grouping rules): set of rules describing which elements in an image
will appear to group together
- Gestalt law of “good continuation”: two elements tend to group together if thy
seem to lie on the smooth contour
-Texture segmentation-carving an image into regions of common texture
properties; camouflouge;
- Gesalt law of similarity: elements group together if they are similar
-Gestalt law of proximity: two elements group together if their distance is small
-Feature conjuction- too much for the visual system, squares and diamonds
- Group parallels and symmetrical together
-Gestalt law of common fate: groups together elements that are moving in the
same direction; things move together
-Gestalt law of synchrony- group of elements changing at the same time together
-Common fate: group of elements moving in the same direction together
-Common region- elements perceived to be part of a larger group together
-Connectedness: elements that are connected to each other group together
- Parallel processing
- Committee rules- honour the law of physics, concave, holes
- Figure-ground segmentation and occlusions
--what is the to be recognized object and what is the background?
-figure-ground assignment: determines that some image region belongs to an object
in the foreground, other regions are part of the background
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